Resins methylmethacrylate

Polymethylmethacrylate (Lucite, Plexiglas, Crystallite or PMMA)., A thermoplastic translucent resin of the acrylate resin family. The monomer, methylmethacrylate ... 

Transesterification is a crucial step in several industrial processes such as (i) production of higher acrylates from methylmethacrylate (for applications in resins and paints), (ii) polyethene terephthalate (PET) production from dimethyl terephthalate (DMT) and ethene glycol (in polyester manufacturing),... 

P.Y.83 shows excellent lightfastness, even in methylmethacrylate or unsaturated polyester cast resins. The pigment does not affect the hardening of the latter. 

Besides its use in cast resin, such as methylmethacrylate mixtures, P.Y.16 has gained recognition as a colorant for felt-tip pens, water colors, and a number of related applications. It lends color to leather, mass and surface paper coloration, and paper pulp. 

One of the primary fields of application for P.R.151 is in polystyrene, although there is a slight color change at temperatures above 260°C, at which the pigment partially dissolves. It is also used to a considerable extent in ABS. Cast resins based on methylmethacrylate and unsaturated polyesters are also frequently colored with P.R.151, which is resistant to the peroxide catalysts that are used to harden the plastic. The lightfastness in these media is good it equals step 6-7 on the Blue Scale. 

Leenheer (1985) has reviewed procedures used by water scientists for the fractionation of aquatic HS. Water scientists introduced the Rohm and Haas resins XAD-8 [(poly)methylmethacrylate] and XAD-4 (styrenedivinly benzene) for the separation and isolation of HAs, FAs, and XAD-4 acids. The less polar HA and FA components sorb on XAD-8, and the polar components elute through the resin but are held by XAD-4. The HAs and FAs are recovered during back elution in dilute base, and the HAs are then precipitated at pH 2. The XAD-4 acids are also back-eluted in base, H+-exchanged using IR-120 H+-exchanged resin, and freeze-dried. The resin techniques are applicable to soil extracts, and they have been used successfully by Hayes et al. (2008) for the fractionation of extracts from soils and their drainage waters. 

There are no accurate determinations of the overall contributions of peptide components to the compositions of HS and of SOM. The difficulties arise from the problems of separating these from other components of the SOM mixtures. Use of DMSO + 1% 12M HC1 and XAD-8 resin [(poly)methylmethacrylate] technology enabled Appelqvist et al. (1996) to decrease the amino acid content of a HA by 23%, and the decrease was uniform for the different amino acid groupings. This still left considerable amounts of peptide material in association with the HAs. Some may well have been in association with the humic matrix, and some may have been covalently linked to the humic core through, for example, the formation of Schiff... 

Anion-exchange resin useful for the extraction of copper from esters has been obtained by the amination of methylmethacrylate — DVB copolymer with hydrazine or guanidine Acryloyl chloride undergoes spontaneous polymerization with polyethylenepolyamine at room temperature to give an anion-exchange resin with high capacity and selectivity for bivalent metal ions... 

Poly(methylmethacrylate) is a well-known single component positive photoresist, whereas a diazoqui-none ester and a phenolic novolak resin is a two component positive photoresist. As anticipated, radiation will render the scission or rupture the main and side chain of the polymer making it soluble in an alkaline developing solution. Hydroxide solutions such as KOH and tetramethylammonium hydroxide are commonly used as the developer for positive photoresist. 

Malcolm, R. L., Thurman, E. M., and Aiken, G. R. (1977). The concentration and fractionation of trace organic solutes from natural and polluted waters using XAD-8, a methylmethacrylate resin. In Trace Substances in Environmental Health—XI. (D. D. Hemphill, ed.). University of Missouri, Columbia, pp. 307-314. 

Methylmethacrylate (MMA) is the building block for a wide range of products. It polymerises easily to form transparent resins and polymers, e.g. kitchen and bathroom surfaces, co-polymerises with other monomers, and is used in paints and coatings. 

Latex describes the type of resin or binder used. Exterior paint usually contains 100% acrylic latex emulsions, which usually are copolymers of methylmethacrylate with butyiacrylate or 2-ethylhexylacrylate. This combination stands up well against uv radiation. Interior paint has no uv requirement, and the best combination for cost is a copolymer of vinylacetate and acrylates. Many other formulations are availabledepending on the use and quality desired. 

Figure 1.2. Izod impact strength at room temperature as a function of diameter of elastomeric particles in methylmethacrylate-butadiene-styrene copolymer used for toughening polyvinylchloride resin [after Bertelo and Mori, 1994].

PS is one of the most frequendy foamable thermoplastic resin. Blends that belong to this category are presented in Table 1.13. Recendy blends containing > 50 wt% PS (MW = 200 kg/mol) and acryhc copolymers were described as particularly useful for the manufacture of low density foams. The acrylic copolymer contained methylmethacrylate and, e.g., 5 wt% of ethylacrylate. The presence of copolymer facilitated foaming, but it reduced the foam compressive strength. The best balance was obtained using about 22 wt% of the copolymer. 

In Enplex ABS/PVC blends, ABS contains some a-methyl styrene and a methylmethacrylate, MMA, copolymer. An in-line screw injection machine for molding general-purpose ABS, PS and similar resins can be used. The machine should have multi-stage injection speed control unit and a cooling blower unit to control shearing... 

One can rationalize a need for small rubber inclusions in some of the newer approaches to waterborne and high solids epoxy coating systems. Water-thinned epoxy coating compositions are described (48) where the two-component system consists of a nitrile rubber modified epoxy resin in the epoxide component and a styrene/ butadiene/methylmethacrylate latex modifier for an emulsion-based polyamide hardener component. Showing improved adhesion, impact and water resistance, the paint has good wetting characteristics and can be formulated to a high solids content at low viscosity. 

Ki-aton G1600 SEES Perfluorinated ionomers Phenolic resins Polystyrene, head-to-head Poly(yinyl chloride), head-to-head S tyrene- acrylonitrile Styrene-butadiene elastomers Styrene-methylmethacrylate copolymer Sulfo-ethylene-propylene-diene monomer ionomers Vinylidene fluoride-hexafluoropropylene elastomers Chemigum... 

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